It's official. Julio Cesar Chavez Jr. and Nonito Donaire — considered two of boxing's brightest young stars — will be appearing in separate world title fights Feb. 4 at the Alamodome.

Top Rank, the promoter for the fighters, made the announcement Wednesday.

Chavez (44-0-1, 31 KOs) is scheduled to take on fellow Mexican countryman Marco Antonio Rubio (53-5-1, 46 KOs) in the 12-round main event.

Donaire, (27-1, 18 KOs) of the Philippines, one of the sport's top pound-for-pound attractions, is set to meet Wilfredo Vazquez Jr. (21-1-1, 18 KOs) of Puerto Rico for the vacant WBO junior featherweight title.

“It's Super Bowl weekend, but you can't go wrong with a facility like the Alamodome,” Top Rank spokesman Carl Moretti said. “It's some big fights and some big names. It should be a lot of fun.”

The world title doubleheader, dubbed “Welcome to the Future,” will be televised live on HBO's “World Championship Boxing” at 9 p.m.

A news conference to introduce all four fighters and announce local boxers being added to the card is scheduled for 11:30 a.m. Tuesday at the dome.

“This is the best card San Antonio has had in a long time,” said Fort Worth regional promoter Lester Bedford, the event coordinator for the show.

Chavez, the son of the legendary champion by the same name, is coming off a fifth-round TKO of Peter Manfredo Jr. on Nov. 19 at Reliant Arena in Houston.

But whether Chavez's WBC belt will be at stake against Rubio is unclear.

The ratings organization earlier this month ordered Chavez to defend against lineal champion Sergio Martinez. But the WBC left open the possibility of the mandatory defense being postponed if the Chavez and Martinez camps can come to an agreement about an alternative.

Chavez has already fought twice at the Alamodome. He beat Anthony Shuler in a second-round knockout April 14, 2007, on a Manny Pacquiao undercard, and John Duddy by unanimous decision June 26, 2010.

Tickets for the Feb. 4 card, priced at $200, $100, $60, $40 and $25, can be purchased beginning Saturday at the Alamodome box office, all Ticketmaster outlets, online at ticketmaster.com and via Ticketmaster charge-by-phone lines at 800-745-3000.